Wireless performance testing method and system based on quiet zone expansion in a compact antenna test range

A wireless performance testing method based on quiet zone expansion in a compact antenna test range, wherein the wireless performance testing method is implemented based on a wireless performance testing device, the wireless performance testing device includes a microwave anechoic chamber, a feed antenna arranged inside the microwave anechoic chamber, a reflector, and a turntable;

• a device under test is placed on the turntable, the turntable is configured to drive the device under test to rotate;
• the reflector has a reflecting surface, the feed antenna is arranged between the reflecting surface and the turntable, and a center of the reflecting surface, a focal point of the reflecting surface and a center of the device under test are aligned on a same straight line;
• and the feed antenna can be moved along a first straight line, and the first straight line passes through the focal point of the reflecting surface and is perpendicular to a line connecting the center of the reflecting surface and the center of the device under test;
• and
• the wireless performance testing method includes following steps:
• placing the feed antenna at the focal point of the reflecting surface to form an original quiet zone, and acquire an original phase of the feed antenna;
• rotating the turntable to obtain a first scattering parameter of the device under test, where the first scattering parameter is used to characterize wireless communication performance of the device under test in the original quiet zone;
• moving the feed antenna along the first straight line, with a moving distance of the feed antenna designated as a first distance;
• inputting the first distance to a phase compensation model to obtain a compensation phase;
• compensating the original phase according to the compensation phase to obtain an adjusted phase, adjust the original phase of the feed antenna to the adjusted phase to form an adjusted quiet zone;
• rotating the turntable to obtain a second scattering parameter of the device under test, where the second scattering parameter is used to characterize the wireless communication performance of the device under test in the adjusted quiet zone;
• and
• moving the feed antenna along the first straight line repeatedly to different positions to obtain a plurality of the second scattering parameters;
• and the first scattering parameter and the plurality of the second scattering parameters are used to jointly characterize the wireless communication performance of the device under test.